Gate-dependent Raman and spatially resolved VEELS show FeSe phonons soften with gate voltage and FeSe plasmons red-shift near the FeSe/SrTiO3 interface, suggesting nonlocal interfacial coupling.
Cheng et al., EPL (Europhysics Letters) 85, 67003 (2009)
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Spectroscopic Signatures of Nonlocal Interfacial Coupling in Superconducting FeSe/SrTiO3 Heterostructures
Gate-dependent Raman and spatially resolved VEELS show FeSe phonons soften with gate voltage and FeSe plasmons red-shift near the FeSe/SrTiO3 interface, suggesting nonlocal interfacial coupling.